/*
 * Copyright (C) 2011 Vitaljok
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package phd.mrs.heuristic.utils;

/**
 *
 * @author Vitaljok
 */
public abstract class CachedProperty<T> {

    T value;

    protected abstract T calculateValue();

    public T getValue() {
        if (this.value == null) {
            this.value = calculateValue();
        }
        return value;
    }
}
